Suppose the resultant force FR displaces a particle of mass m from location 1 to 2 along the path s. If the magnitudes of the velocities of the particle at positions 1 and 2 are respectively V1 and V2, it can be shown that U1-2 = 1/2 (mV22-mV12). This equation is represents ________________________. Group of answer choices principle of work. principle of energy. principle of momentum. principle of work and energy